Do NOT evolve this unit. Her negation of INT attacks is very valuable, much more so than any other evolution. Yes, that includes her final form Nami Thunderbolt Tempo which is garbage. DO. NOT. EVOLVE.

She is used as part of the low-level player Rainbow Dragon farming team, and can be used against some late-game content bosses, such as during Clash!! Zephyr!. She can also be used to clear some Training Forests.

Socket guide: Bind/Despair, particularly for Training Forests.

While Nami Mirage Tempo: The Heavens offers similar functionality with higher stats, she has slower MAX CD (11). For repeated use, therefore, Mirage is better, but for singular, The Heavens variant may be better.